The 49ers saw top draft pick Mykel Williams exit with a hyperextended knee in their spirited joint practice with the Denver Broncos.

Mykel Williams had to leave practice early on Thursday, but the initial exam by the team's medical staff led to optimism that he'll be back on the field soon.

T raining camp in the NFL is nearing its end, but preseason games are just getting started. An unfortunate outcome of the preseason, camp especially, are injuries. Players are getting back into the rhythm of the game, as well as accustomed to the contact and unnatural movements that are a part of football.